/*
 * Copyright 2007-2009 Thomas Krause (thomas@berlin-reloaded.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gidoo.cms.helper;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import org.apache.wicket.RequestCycle;
import org.apache.wicket.markup.html.link.Link;
import org.apache.wicket.request.target.resource.ResourceStreamRequestTarget;
import org.gidoo.cms.GidooCMS;
import org.gidoo.cms.login.GidooCMSSession;

/**
 * A link that will stream a resource content to the browser.
 * @author <a href="mailto:thomas@berlin-reloaded.de>Thomas Krause</a>
 */
public class ResourceDownloadLink extends Link
{

  private String resourcePath;
  
  /**
   * Constructor.
   * @param id The wicket id.
   * @param resource The resource to stream.
   */
  public ResourceDownloadLink(String id, Node resource)
  {
    super(id);    
    try
    {
      resourcePath = resource.getPath();
    }
    catch(RepositoryException ex)
    {
      Logger.getLogger(ResourceDownloadLink.class.getName()).log(Level.SEVERE, null, ex);
      error(getString("jcrerror"));
    }
  }
  
  @Override
  public void onClick()
  {
    try
    {
      if(resourcePath == null)
      {
        return;
      }
      Node resource = ((GidooCMSSession) getSession()).getJcrRootNode().getNode(resourcePath.substring(1));

      CMSResourceStreamWriter writer = new CMSResourceStreamWriter(resource, (GidooCMS) getApplication());
      String name = resource.getName();
      if(resource.getParent().getName().equals("drafts"))
      {
        name = Tools.draftName2Path(name);
        name = name.substring(name.lastIndexOf("/")+1);
      }
      
      RequestCycle.get().setRequestTarget(new ResourceStreamRequestTarget(writer, name));
    }
    catch(RepositoryException ex)
    {
      Logger.getLogger(ResourceDownloadLink.class.getName()).log(Level.SEVERE, null, ex);
      error(getString("jcrerror"));
    }

  }
}
